Which Would You Expect to Be More Viscous,a Polymer Made

Which would you expect to be more viscous,a polymer made of long molecular strands or one made of short molecular strands? Why?

A) short molecular strands because of a greater density
B) long molecular strands because they tend to tangle among themselves
C) short molecular strands because their ends are typically polar
D) long molecular strands because of a greater molecular mass